Gaya APA

Greenberger,, N, J. et al (2009). (E) CURRENT Diagnosis & Treatment Gastroenterology, Hepatology, & Endoscopy . : The McGraw-Hill Companies.

Gaya MLA

Greenberger,, Norton, J.. et al. "(E) CURRENT Diagnosis & Treatment Gastroenterology, Hepatology, & Endoscopy". : The McGraw-Hill Companies, 2009. Text.